"Night training" or whatever you want to call it

Ds has been potty trained for more than a year. He's reliable & accident free, & has been ever since our 4 day potty training "bootcamp," but he still wears a diaper at night. Some days he's dry, but many times he's not.

Let me admit up front we are not great about cutting of liquids early, which we know we will need to do.

We know many people IRL whose kids are in this same boat, so I don't feel like it's hugely unusual, but I'm wondering if it's time we try to be more proactive.

So here's my main question. Assuming we cut off liquids earlier, will he actually learn from having some accidents & become night dry or will we simply be doing laundry & changing sheets long-term?

I guess I'm curious to know if just letting him go & having him experience some accidents will actually assist in the learning process or if it will just be a huge amount of work for us with no end in sight.

He does sleep very deeply & he does not wake up when he has to pee, which is why we've avoided this issue so far. It also seems as if he pees in the morning rather than in the middle of the night.